The 369-HI-R-M-0-0-H is a high-performance Motor Management Relay from the GE Multilin 369 series. It is designed specifically to provide comprehensive protection, monitoring, and diagnostics for three-phase AC motors. By integrating advanced thermal modeling and motor-specific control logic, it ensures the reliability and longevity of critical industrial motors, preventing costly downtime and equipment failure.
Product Specifications
| Feature | Details |
| Model Number | 369-HI-R-M-0-0-H |
| Device Type | Motor Management Relay |
| Protection Functions | Thermal model, Overload, Stall/Locked Rotor, Phase Reversal |
| Control Voltage | High Range (HI: 88-300 Vdc / 70-265 Vac) |
| Communication | RS485 (Standard), Ethernet (Optional) |
| Weight | Approximately 2.0 kg – 2.5 kg |
| Country of Origin | Canada / USA |
Application Fields
The GE Multilin 369 is widely utilized in heavy industrial environments where motor health is paramount:
- Petrochemical & Oil/Gas: Protecting large pumping systems and compressors.
- Mining & Metals: Safeguarding conveyors, crushers, and mill motors from thermal overstress.
- Water & Wastewater: Ensuring continuous operation of lift stations and treatment pumps.
- Power Generation: Monitoring auxiliary motors in turbine and boiler environments.
Product Usage Instructions
Installation should be performed by qualified electrical personnel familiar with motor control circuits.
- Mounting: The relay is designed for standard panel mounting. Ensure adequate clearance for cable management and access to the front-panel display.
- Wiring: Connect the three-phase CT inputs (current transformers) and PT inputs (potential transformers) according to the specific wiring diagram for the 369-HI-R-M-0-0-H model. Ensure the grounding terminal is connected to the cabinet earth bus to minimize electromagnetic interference.
- Configuration: Use the EnerVista 369 Setup software to define motor data (Full Load Amps, Service Factor, thermal curves). Proper entry of motor data is critical for the internal thermal model to accurately protect the motor.
- Commissioning: Perform a secondary injection test to confirm that protection thresholds (e.g., thermal overload trip time) match the motor’s manufacturer-specified thermal damage curve.
Frequently Asked Questions
Q: What does the “369-HI-R-M-0-0-H” suffix indicate?
A: These codes define the hardware configuration. “HI” refers to the high-range power supply, “R” indicates the presence of an RTD input (for temperature monitoring), and the remaining digits specify the communication and I/O options installed in your unit.
Q: How does the relay protect against thermal damage?
A: The relay uses a proprietary thermal model that calculates heat accumulation based on real-time current measurements. It tracks heating during motor start, run, and even after a shutdown to prevent restarting an overheated motor.
Q: Can I access the relay remotely?
A: Yes. Via the RS485 communication port or an optional Ethernet interface, you can connect the relay to a SCADA system or a PC running EnerVista software to monitor real-time motor status, alarms, and event records.
Q: How do I clear an alarm or trip?
A: You can reset the relay using the “Reset” button on the front panel, via a digital input programmed for remote reset, or through a command sent from your control software, provided the motor thermal status is within the safe limits for restart.
